Printing instrumentalities for typewriting machines



Dec. 11, 1934. c FUCHS -r' 1,984,014

PRINTING INSTRUMENTALITIES FOR TYPEWRITING MACHINES Filed May 22, 1931 INVENTORS Charles/lfuchs and Henr Resch. B%Wm A7TOR/VEY Patented Dec. 11, 1934 UNETED STATES Arsar orrics PRINTING IN STRUMENTALITIES FOR TYPEWRITING MACHHNES Application May 22, 1931,.Serial 539,182

4 Claims.

This invention relates to improvements in typewriting machines and more particularly to type carriers or shuttles adapted to be reciprocated on a ring-like support or anvil. It is in the nature of an improvement on our application, Serial No. 539,181, filed May 22, 1931.

Heretofore, the type segment of the shuttle in the Varityper writing machinain connection with which the invention is herein illustrated, consisted of hard rubber, the rubber be ing molded on a perforated metal, reinforcing segment extending from top to bottom and from side to side of the type segment. A guide fin or web, also composed of metal, was attached in a suitable manner to the perforated reinforcing segment. This construction provided a relatively heavy shuttle, its weight being about sixteen hundredths (.16) of a pound which has greatly hindered the speed of actuation of the machine since the inertia of the shuttle must be overcome at the actuation of each key lever.

The present invention provides a shuttle, which is made of moldable phenol condensation product such as bakelite or condensite which is lighter and more durable than that used hereas to prevent breakage thereof by careless operators. In this novel type shuttle the-weight thereof is reduced to ten hundredths (.10) of a pound which greatly reduces the inertia thereof with a result that the speed of the machine (words per minutes) is greatly increased. The

touch of the key levers is also about 30% lighter than heretofore.

A feature of the invention relates to the manner in which the flange is secured to the type segment.

Other features and advantages will hereinafter appear.

In the drawing which forms part of the specification,

Fig. 1 is a sectional, side view of a portion of the machine showing the novel shuttle applied thereto;

Fig. 2 is a detail sectional view, on a' larger scale, through the type shuttle;

Fig. 3 is a top plan view of the type shuttle and the hammer; and

Fig. 4 is a detail view of the segment which eventually becomes the operating web of the type shuttle.

Similar reference characters represent similar parts throughout the specification.

'Themachine includes feed rollers 10 and 11, one. carriage (not shown) by which a work sheet 12 is fed upwardly between a type carrier 13, at the front of. the work-sheet, and a hammer 14 to co-operate therewith; the hammer being operated, in the usual manner, upon the actuation of key levers (not shown) to print against any one of the types 15, 16 or 17, arranged in three rows, on the type carrier, the work-sheet 12 being interposed between the hammer and the type carrier.

The type carrier or shuttle 13 is mounted on a ring-like support or anvil 18 to which the blow of the hammer 14 is transmitted. Said anvil has a slot 20 through which extends a guide web or actuating segment 21 from a type segment 22 of the shuttle 13, which shuttle is formed in a manner hereinafter explained.

The shuttle 13 is provided with two groups of I types at opposite sides of the hammer 14 (Fig. 3), and it is operable by a lever or actuator 24 from a central position, to either side of the ma chine to carry the desired types to the printing point opposite the hammer. The shuttle actuating lever is pivotally supported by a sleeve 25 to swing about a vertical shaft 26 suitably supported in the machine frame 27; said lever having a vertical finger 28 engaging in a bushing 29 on thefiange 21. The shuttle actuator 24 is operable by any one of two vertically disposed arms 30and 31.0f frames (not shown) actuated by. the usual key levers. wIndexing pins 32 are also. operable by the. key levers to. project them into the path of an arm 33 of the actuator 24 to register the selected type at the printing point.

The anvil 18 may be shifted vertically, in the usual manner, to carry the type shuttle therewith for the purpose of locating any one of the rows of types, of the type shuttle, at the printing line; the finger 28 of the actuating lever 24 being long enough to engage the shuttle in all of these positions.

The anvil 18 may also be lifted to a position where the type shuttle is out of engagement with the finger 28 of the shuttle actuator 24, in order to connect or disconnect the type shuttle. In connecting the shuttle with the finger 28, said shuttle is moved circumferentially of the anvil until the aperture 35 of the bushing 29 registers with the finger 28. The anvil 18 is then lowered and the finger 28 passes up into the hole 35 thus connecting the shuttle 13 with the actuator 24.

Careless operators may lower the shuttle before the aperture 35 registers with the finger 25, the flange 21 striking the. finger, which, if the flange is not sufficiently strong, results in injury thereto. The web 21, in the present invention, is therefore made of metal, and preferably German silver, so as to prevent injury to the shuttle.

The web 21 is formed from a segment 36 (Fig. 4) which may be conveniently held in a mold. The segment 36 has formed on the outer edge thereof two spur-dike flanges 37 extending in opposite directions. The balrelite or other suitable material of which the type segment 22 of the shuttle is formed flows around the flanges 3"! while in the mold, so that after the type segment solidifies it is held on the segment 36 by the flanges 37. Due to the fact that the co-efiicient of expansion and contraction of bakelite is greater than that of German silver, there is a slight shrinkage of the type segment relatively to the segment 36, while cooling.

Although there is, during this shrinking, a slight slippage of the type segment on the metal segment 36 the type segment tends to draw on the outer edge of the metal segment 36 and towards the middle of said edge, thus decreasingthe curvature of the metal segment or in other words unfolding it. Under these conditions the curvature of the shuttle would not conform to that of the anvil or supporting ring 18, which is objectionable.

To compensate for this tendency to change the curvature of the shuttle the metal segment is sprung slightly to the dotted line position in Fig. 4, to decrease its curvature, and is held in this condition while the type segment is being molded thereon. Upon cooling the metal segment tends to spring back to its original shape, thus resisting the tendency to unfold it caused by the bakelite segment.

By an inspection of Fig. 2 it will be seen that the metal segment 21 extends into the back of the type segment 22 and close to the outer surface of said type segment and weakens the type segment. This is overcome, however, by the types 16 of the middle row which types serve also as reenforcing members for that part of the type segment where it is molded on to the metal flange.

After the shuttle thus far formed is cooled the segment 36 is trimmed to form the flange 21 to eliminate the unnecessary material. The bushing 29 is then also attached to the flange 21.

While certain preferred embodiments of the invention have been described, it will be understood that changes in the form, arrangements, proportions, sizes and details thereof may be made without departing from the scope of the invention as defined in the appended claims.

We claim:

1. In a typewriting machine, the combination of printing instrumentalities including a type carrier, and a hammer to cooperate therewith, said type carrier comprising a type segment composed of molded material, and a metal actuating segment, both segments being curved, and the metal segment being under stress tending to alter its curvature and having two spur-like flanges formed on the curved edge of said metal segment and extending along the entire edge, said flanges extending in opposite directions from the parallel faces of the metal segment and embedded in in the type segment.

2. A type shuttle for a typewriting machine, said shuttle comprising a type segment composed of moldable material, and a segmental metal flange thereon, said type segment having a plurality of rows, of types formed on its outer face and extending from side to side thereof, and a metal actuating segment T-shaped in cross-section and having its head which is wider than the thickness of the body of the metal flange and which head is embedded in thetype segment, and located close to the outer face and behind one row of types so that the types may serve as reenforcing members for the portion of the type segment at the edge of the metal flange, the metal flange being under stress to coimteract the tendency of the type segment to alter the curvature of the metal flange to thus hold the shuttle in its proper shape.

3. A type shuttle for a typewriting machine, said shuttle comprising a type segment composed of molded material, and a metal web-like segment thereon, the edge of the metal segment being embedded in the type segment, the metal segment being under stress tending to increase its curvature to counteract the tendency of the type segment to decrease the curvature of the metal segment to thus hold the shuttle in its proper shape.

4. A type shuttle for a typewriting machine, said shuttle comprising a type segment composed of molded material, and a thin sheet metal segment thereon, the metal segment being under stress and tending to alter its curvature to counteract the tendency of the type segment to alter the curvature of the metal segment in an opposite direction to thus hold the shuttle in its proper shape.

CHARLES A. FUCHS. HENRY RESCH. 

